燃煤电厂煤粉燃烧过程中辐射传热计算方法研究进展与展望  

Research Progress and Prospect of Radiative Heat Transfer Calculation Method in Pulverized Coal Combustion Process on Coal-fired Power Plant

作　　者：刘鹏宇 李德波 刘彦丰[1] 陈兆立 廖宏楷 冯永新 LIU Pengyu;Li Debo;LIU Yanfeng;CHEN Zhaoli;LIAO Hongkai;FENG Yongxin(Department of Power Engineering,North China Electric Power University,Baoding,Hebei 071003,China;China Southern Grid Power Technology Co.,Ltd.,Guangzhou,Guangdong 510080,China)

机构地区：[1]华北电力大学动力工程系,河北保定071003 [2]南方电网电力科技股份有限公司,广东广州510080

出　　处：《广东电力》2022年第4期11-20,共10页Guangdong Electric Power

基　　金：国家自然科学基金重点项目(51376161)。

摘　　要：辐射传热是燃煤电厂煤粉燃烧过程中最主要的传热方式,其数值计算的方法和模型精度是开展炉内火焰及受热面温度监测的重要影响因素。综述了区域法、离散坐标法、离散传递法、蒙特卡洛法和DRESOR法等辐射传热计算方法的机理、优缺点及应用,并基于现役火电机组的工程实际需要对各方法进行总结和展望。研究结果表明:区域法应进一步简化直接交换面积的计算,并开发改进算法或与其他方法耦合,以应用于非灰体和散射性介质的辐射传热计算中;离散坐标法、离散传递法应在原模型基础上进行改进,以应用于工程实际;蒙特卡洛法应基于商业计算流体力学数值模拟后的炉内温度计算结果来开展研究;DRESOR法具有良好的应用前景,应多基于现役火电机组开展辐射传热计算方面的研究。Radiative heat transfer is the most important heat transfer mode in the coal-fired power plant boiler unit,and its numerical calculation method and model accuracy are important factors to carry out temperature monitoring of furnace flame and heating surface.Therefore,this paper reviews the mechanisms,advantages and disadvantages and applications of the mainstream radiative heat transfer calculation methods,such as zone method,discrete ordinate method,discrete transfer method,Monte Carlo method and DRESOR method.It also summarizes and prospects each method base on the actual engineering needs of existing thermal power units.The research results show that the zone method should further simplify the calculation of direct exchange area,and develop an improved algorithm or coupled with other methods to be applied to the calculation of radiative heat transfer in the non-gray and scattering media.Secondly,the discrete ordinate method and the discrete transfer method should be improved on the original model and applied to engineering practice,and the Monte Carlo method should be studied based on the results of temperature calculations in the furnace after commercial CFD numerical simulation.In addition,the DRESOR method has a good application prospect,so it should be studied based on the existing thermal power units to carry out radiative heat transfer calculation.

关 键 词：燃煤电厂 辐射传热 深度调峰 数学模型 

分 类 号：TM621.2[电气工程—电力系统及自动化] TK227.1[动力工程及工程热物理—动力机械及工程]